A prize winning bikini contest model who claimed she was the Pakistani representative has sparked outrage in the predominantly muslim country.Stunning Mariyah Moten, 22, won the 'Best in Media' title - for being the most photographed and interviewed contestant - at the pageant in the Chinese resort of Beihai.But furious Pakistani authorities say she did not have permission to represent the country, where many women only go out in public covered in a veil.They are now threatening the model, who grew up in Pakistan but holds a US passport after she moved there eight years ago, with restrictions on entering her homeland."We have asked our missions in Washington and Beijing to investigate this because it is against our policy, culture and religion," senior Culture Ministry official Abdul Hafeez Chaudhry said."She is an American passport holder. She is an American national of Pakistani origin, so how did she get entry as a Pakistani?"Moten, a student of hotel management at the University of Houston, was born and brought up in the Pakistani city of Karachi.Mr Chaudhry said Pakistan - which does not hold beauty contests - might take the issue up with China, depending on the result of the investigation.He also said the government might withdraw from Moten special privileges offered to people of Pakistani descent such as visa-free travel to Pakistan.